if you concentrate all your energies ___the study of English ,you will master the language.

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ifyouconcentrateallyourenergies___thestudyofEnglish,youwillmasterthelanguage.ifyouconcentrateallyour

if you concentrate all your energies ___the study of English ,you will master the language.
if you concentrate all your energies ___the study of English ,you will master the language.

if you concentrate all your energies ___the study of English ,you will master the language.
on/upon